package com.webserver.core;

import com.webserver.http.HttpServletRequest;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.nio.charset.StandardCharsets;

/**
 * 负责与指定客户端进行一次HTTP交互
 * HTTP协议要求客户端与服务端采取一问一答的交互规则.
 * 并在交互完毕后断开TCP连接
 *
 * 因此,这里处理一次HTTP交互采取的过程分为三部分:
 * 1:解析请求(读取客户端发送过来的HTTP请求内容)
 * 2:处理请求(分析请求信息确定客户端意图,并进行对应的处理)
 * 3:发送响应(给浏览器发送一个HTTP中的响应,将处理结果回复给浏览器)
 */
public class ClientHandler_Self implements Runnable{

    private Socket socket;
    public ClientHandler_Self(Socket socket){
        this.socket = socket;
    }
    public void run(){
        try {
            //http://localhost:8088
            // 1.解析请求
          HttpServletRequest request = new HttpServletRequest(socket);
            //2.处理请求


           String path = request.getUri();

            System.out.println("请求的抽象路径:"+path);

            File file = new File("./webapps" + path);
            if(file.exists()&& file.isFile()) {


                //3.发送响应

                //3.1发送状态行
                String line = "HTTP/1.1 200 OK";
                println(line);
                //3.2发送响应头
                println("Content-Type: text/html");
                println("Content-Length: " + file.length());
                println("");//单独发送回车换行表示响应头发送完毕
                //3.3发送响应正文
                FileInputStream fis = new FileInputStream(file);
                OutputStream out = socket.getOutputStream();
                byte[] data = new byte[1024 * 10];
                int len;
                while ((len = fis.read(data)) != -1) {
                    out.write(data, 0, len);
                }
                System.out.println("响应发送完毕");
            }else{
                File files = new File("./webapps/root/404.html"  );
                //3.1发送状态行
                String line = "HTTP/1.1 404 NotFound";
                println(line);
                //3.2发送响应头
                println("Content-Type: text/html");
                println("Content-Length: " + files.length());
                println("");//单独发送回车换行表示响应头发送完毕
                //3.3发送响应正文
                FileInputStream fis = new FileInputStream(files);
                OutputStream out = socket.getOutputStream();
                byte[] data = new byte[1024 * 10];
                int len;
                while ((len = fis.read(data)) != -1) {
                    out.write(data, 0, len);
                }
                System.out.println("响应");

            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                //交互后语客户端断开连接
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
    private void println(String line) throws IOException {
        //通过
        OutputStream out = socket.getOutputStream();
        byte[] data = line.getBytes(StandardCharsets.ISO_8859_1);
        out.write(data);
        out.write(13);//单独发送回车键
        out.write(10);//单独发送换行键
    }


}
